| Summary: | Existing problems resulting from the shortage of fossil fuels and the environmental degradation caused by their use has become vital to the use of renewable energies to replace these fuels. This need is reflected in the objective 87 of the Guidelines for Economic and Social Policy of the Party and the Revolution adopted at the Sixth Congress of the PCC. This paper aims at a theoretical experimental study aimed for the future utilization of waste (biomass) for energy purposes, residue derived from the brewing, in Cuban industries. The cost-benefit analysis to select the best variant of three possible is used. The result showed choose the variant: use biogas for saving fuel oil in boilers, with a term of payback of three years.
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